ERROR opening https://cactus.nci.nih.gov/chemical/structure/c43%5CC%28%3DC1/CCN%28C%29CC1%29c2ccccc2%5CC%3DC/c3cccc4/file?format=sdf&get3d=True  -- c43%5CC%28%3DC1/CCN%28C%29CC1%29c2ccccc2%5CC%3DC/c3cccc4 could not be loaded.